.header_body{
    height: 100px;
    width: 100%;
    background-color: #1956A7;
    color: aliceblue;
}
.register_title{
    float: left;
}
.login_back{
    float: right;
}
.login_back a{
    text-decoration: none;
}
.login_back a:active {
    text-decoration: none;
}